||Guidance for tracking progress under the regional haze rule.
||Environmental Protection Agency, Research Triangle Park, NC. Emissions, Monitoring, and Analysis Div.
||U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Emissions, Monitoring and Analysis Division, Air Quality Trends and Analysis Group,
Air pollutants ;
Air quality ;
Light availability ;
Air pollution ;
Light scattering ;
Tables (Data) ;
Air quality management ;
Clean Air Act
||Research Triangle Park Library/RTP, NC
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||1 v. (various pagings) : ill., map, charts ; 28 cm.
Regional haze is visibility impairment caused by the cumulative air pollutant emissions from numerous sources over a wide geographic area. Visibility impairment is caused by particles and gases in the atmosphere. Some particles and gases scatter light while others absorb light. The net effect is called 'light extinction'. The result of these processes is a reduction of the amount of light from a scene that is returned to the observer, as well as an addition of scattered light to the sight path, creating a hazy condition. This document provides guidance to EPA Regional, State, and Tribal air quality management authorities and the general public, on how EPA intends to exercise its discretion in implementing Clean Air Act provisions and EPA regulations, concerning the tracking of progress under the regional haze program. The guidance is designed to implement national policy on these issues.
Project Officer: Neil Frank. "September 2003." "EPA-454/B-03-004." Includes bibliographical references. 68-D-02-0261